Đặt câu hỏi cho cụm từ gạch chân:
1) He spends most of his free time carving eggshells
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2) I often share my hobby with my best friend
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3) I started working as a volunteer in 2015
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4) My mother has done charitable work for five years
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5) She went to the doctor because she had a high fever
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Cụm từ nào gạch chân đấy bạn ơi?